package com.yixing.demo.component;

import com.yixing.demo.constants.Constants;
import io.jsonwebtoken.*;
import io.jsonwebtoken.io.Decoders;
import io.jsonwebtoken.io.Encoders;
import io.jsonwebtoken.security.Keys;
import lombok.extern.slf4j.Slf4j;

import javax.crypto.SecretKey;
import java.security.Key;
import java.util.Date;
import java.util.Map;

@Slf4j
public class JwtClass {
    //过期时间: 1小时,以毫秒为单位
    private final static long EXPIRATION_DATE = 60 * 60 * 1000;
    private final static String secretString = "VK3CihZ+PNGaZtUmOqYX9Rf/S38FOmwVTs0/pa8Vc4E=";
    private final static Key key = Keys.hmacShaKeyFor(Decoders.BASE64.decode(secretString));

    //生成令牌
    public static String genToken(Map<String, Object> claim) {
        return Jwts.builder()
                .setClaims(claim)
                .setExpiration(new Date(System.currentTimeMillis() + EXPIRATION_DATE))
                .signWith(key)
                .compact();
    }


    //解析令牌
    public static Claims parseToken(String token){
        JwtParser build = Jwts.parserBuilder().setSigningKey(key).build();
        Claims body = null;
        try {
            body = build.parseClaimsJws(token).getBody();
        } catch (ExpiredJwtException e) {
            log.error("token过期, 校验失败, token:",token);

        } catch (Exception e) {
            log.error("token校验失败, token:",token);
        }
        return body;
    }
}